Example:
"RTC:2017/6/16 7:13 Init:2017/6/16 5:44 UpTime:4744s PWR:PwrVoltage RST:0 GPS:1 SAT:0 TTFF:0 TTLF:0 NOGPS: 1:18 SR:0 FG:200 FL:0 SMS:3 REC:42 MD:1 DB:0"

Response details Description
RTC RTC time.
Init Device initialization time.
UpTime Total up time (in seconds).
PWR Last restart reason.
RST Total abnormal restarts count.
GPS GPS receiver state.

0 – OFF
2 – ON without fix
3 – ON with fix
4 – Sleep mode
5 - Overcurent

SAT Average satellites.
TTFF Time To First Fix.
TTLF Time To Last Fix.
NOGPS How much time no GPS fix (h:min).
SR Number of Sent Records.
FG Failed GPRS counter.
FL Failed link counter.
SMS Sent SMS counter.
REC Records Found – number of records in the memory.
MD Data Mode state.

0 – Home and Stop
1 – Home and Moving
2 – Roaming and Stop
3 – Roaming and Moving
4 – Unknown and Stop
5 – Unknown and Moving

DB DB Values:

0 – SD Card used for records
1 – RAM Drive used for records